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US 2003/0112305 A1Published application
Water base pigment ink for ink-jet recording and ink-jet recording apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsRyuji Kato, Hideto Yamazaki
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Abstract
An ink for ink-jet recording of the present invention comprises a dispersion of a pigment, and an ink solvent containing a water-soluble organic solvent and glycol ether. The ink is prepared such that an Rf value, which represents a rate of flow of the pigment obtained when the pigment dispersion is developed with the ink solvent by means of paper chromatography, is not more than 0.5. The ink has a fast permeation speed, and hence the feathering and the bleeding are avoided.
Claims12
A method for producing an ink for ink-jet recording, comprising:
- preparing a dispersion of a pigment;
- preparing an ink solvent containing a water-soluble organic solvent and glycol ether;
- and
- mixing the pigment dispersion and the ink solvent, wherein:
- amounts of respective components for constituting the pigment dispersion and the ink solvent are adjusted so that an Rf value, which represents a rate of flow of the pigment obtained when the pigment dispersion is developed with the ink solvent by paper chromatography, is not more than 0.5.
2 more elements
An ink for ink-jet recording comprising:
- a dispersion of a pigment;
- a water-soluble organic solvent;
- and
- at least one glycol ether selected from the group consisting of ethylene glycol propyl ether, diethylene glycol propyl ether, triethylene glycol propyl ether, propylene glycol propyl ether, dipropylene glycol propyl ether, and tripropylene glycol propyl ether, wherein:
- an Rf value, which represents a rate of flow of the pigment obtained when the pigment dispersion is developed by paper chromatography with a mixture liquid containing constitutive components of the ink except for the pigment dispersion, is not more than 0.5.
2 more elements
Dependencies are inferred from the claim text.